Pyrite

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Pyrite
2780M-pyrite1.jpg
Pyrite cubic crystals on marl frae Navajún, Rioja, Spain (size: 95 by 78 millimetres (3.7 by 3.1 in), 512 grams (18.1 oz); main crystal: 31 millimetres (1.2 in) on edge)
General
Category Sulfide mineral
Formula
(repeating unit)
FeS2
Strunz classification 02.EB.05a
Dana classification 2.12.1.1
Crystal symmetry Isometric diploidal
Space group: Pa3
H-M seembol: 2/m3
Unit cell a = 5.417 Å, Z=4
Identification
Formula mass 119.98 g/mol
Color Pale brass-yellae reflective; tarnishes darker an iridescent
Crystal habit Cubic, faces mey be striatit, but an aa frequently octahedral an pyritohedron. Eften inter-grown, massive, radiatit, granular, globular, an stalactitic.
Crystal seestem Isometric
Twinnin Penetration an contact twinnin
Cleavage Indistinct on {001}; pairtins on {011} an {111}
Fractur Very uneven, sometimes conchoidal
Tenacity Brittle
Mohs scale hairdness 6–6.5
Luster Metallic, glistenin
Streak Greenish-black tae brounish-black
Diaphaneity Opaque
Specific gravity 4.95–5.10
Density 4.8–5 g/cm3
Fusibility 2.5–3 to a magnetic globule
Solubility Insoluble in watter
Ither characteristics paramagnetic
References [1][2][3][4]

The mineral pyrite, or iron pyrite, an aa kent as fuil's gowd, is an iron sulfide wi the formula FeS2. This mineral's metallic luster an pale brass-yellae hue give it a superficial resemblance tae gowd, hence the well-kent nickname o fuil's gowd. The color haes an aa led tae the nicknames brass, brazzle, an Brazil, primarily uised tae refer tae pyrite foond in coal.[5][6]

References[eedit | eedit soorce]

  1. Hurlbut, Cornelius S.; Klein, Cornelis, 1985, Manual of Mineralogy, 20th ed., John Wiley and Sons, New York, pp 285–286, ISBN 0-471-80580-7
  2. Pyrite on webmineral. Webmineral.com. Retrieved on 2011-05-25.
  3. Pyrite on. Mindat.org. Retrieved on 2011-05-25.
  4. Handbook of Mineralogy. (PDF) . Retrieved on 2011-05-25.
  5. Julia A. Jackson, James Mehl and Klaus Neuendorf, Glossary of Geology, American Geological Institute (2005) p. 82.
  6. Albert H. Fay, A Glossary of the Mining and Mineral Industry, United States Bureau of Mines (1920) pp. 103–104.